define resistivity and write its si unit
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The electrical resistance of an object is a measure of its opposition to the flow of electric current. The inverse quantity is electrical conductance, and is the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with the notion of mechanical friction.
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Explanation:
resistivity is the property of a material it can be defined as the resistance of the wire whose length is 1 metre and area of cross section is 1 metre square
SI unit of Resistivity is ohm metre
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